The invention discloses an analyzing method of a grid fault current shock topological graph. The method comprises the following steps that 1, wiring diagram information and real-time status information of plant stations and primary equipment in all transformer substations are obtained; 2, topology is conducted on the intra-station primary equipment from the position of a breakdown switch in one transformer substation by means of a tree graph algorithm according to the wiring diagram information and the real-time status information, and then topology is conducted from intra-station to the side transformer substations till topology of all the transformer substations is completed; 3, a tree graph formed through topology is output to be the grid fault current shock topological graph in a tree mode by the shortest path. According to the analyzing method of the grid fault current shock topological graph, a shock path of a fault current to a main grid at the fault occurring moment is vividly shown in a grid fault current shock topological graph mode, and an accurate calculation basis is provided for the quantitative research aspect of fault current cumulative shock.